de benardos



(No Mdel.) 2 Sheets-Sheet l. N. DE BENARDOS.

SECONDARY BATTERY.

No. 880,554. Patented Apr. 8, 1888.

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2 Sheets-Sheet 2.

(No Model.)

N. DB'BENARDOSK.

SEGQNDARY BATTERY.

UNITED STATES PATENT risica NICHOLAS DE BENARDOS, OF ST. PETERSBURG,RUSSIA.

SECONDARY BATTERY.

SPECIFICATION forming part of Letters Patent No. 380,554, dated April 3,1888.

Application filed December 2B, 1887.

To all whom it may concern:

Beit known that I, NIoHoLAs DE BnNxRDos, of St. Petersburg, in theEmpire of Russia, have invented certain new and useful Improvements inAccumulators or Secondary Batteries, of which the following is aspeciiication.

In this invention it has been primarily my object to obtain an efticieutand comparatively inexpensive accumulator for use in the process ofworking metals by the direct application of the electric current whichis the subject of Letters Patent of the United States No. 363,320,issued to Stanislas Olsweski and myself on May 17, 1887. Theaccumulator, however, is of course adapted for use in any of theconnections in which such batteries are now commonly employed.

My invention has relation more particularly to the construction of theplates. Each plate consists of a lead frame in which are strung orsecured lead ribbons or strips alternately straight or plain andcorrugated, attached individually by their ends to the frame. Byalternating the flat strips with the corrugated strips the latter arewell spaced and no dittlculty is experienced in preserving the openings(due to the corrugations or bends of the corrugated plates) to beentered by the batteryliquid. By securing the strips individually attheir ends to the opposite bars of the stripcontaining frame they areheld rmly and in such way as to be thoroughly and completely exposed, asthey would not be were they held between side plates or plates (whetherperforated or not) covering their longitudinal edges. I prefer, in orderto attach the strips to the frame, to Weld their ends thereto inaccordance with the process described in the patent hereinbeforereferred to. The corrugations or bends in the corrugated strips extendnot at right angles with the longitudinal edges of said strips, butobliquely thereto, the object being to facilitate the passage anddischarge of the globules of gas generated when the battery is inaction.

In the accompanying drawings, Figure 1 is a perspective view of asingle-cell battery embodying my improvements. Fig. 2 is a horizontalsection of the same. Fig. 3 is a verti cal section of the same in aplane transverse Serial No. $259,205. (No model.)

to the plates. Eig. 4 is a side elevation of one of the plates.

Each plate consists of a lead frame, A, the space inclosed by which islled by the plain or straight lead strips or ribbons b and thecorrugated or bent lead strips or ribbons a, these strips extendingbetween opposite sides of the frame, and being individually securedthereto at their ends, which are for this purpose preferably Welded tothe top and bottom crossbars of the frame by the patented processhereinbefore referred to. The strips are placed closely together, thestraight strips l) alternating with the corrugated or bent strips a, asshown plainly in Fig. 4. The corrugated or bent strips can be readilyformed into this shape from plain straight strips by passing the latterbetween rolls having peripheral ribs and grooves of proper form andarrangement to corru gate cr bend the strip in the desired way. Thecorrugations or bends are not at right angles to the longitudinal edgesof the strips a, but, as shown in Figs. 2 and 4, are oblique or slantingin relation thereto.

The frame A is provided at the top on opposite edges With hooks by whichit may be conveniently hung andsupported upon the upper edge of thecell, which, as usual, is made of glass or some non-conducting andacid-re sisting material. They are also provided at top and bottom withholes y, which receive the spacing bars or rods used when a number ofsuch plates are placed in one cell.

All of the plates constituting an element are connected together by aconducting bar or strip, which is united to said plates preferably bythe patented Welding process aforesaid. One of the hooks x has anextension, x', for this purpose. In the Vcell shown in Fig. 1 there arenine plates in all. The conducting strip or bar (lettered c) on theright of the cell is Welded to and connects four plates, whichconstitute the positive element. The other bar or strip, d, on the leftofthe cell is secured in a similar Way as the live remaining plateswhich constitute the negative element.

The plates are placed with faces opposed to one another, and are soarranged that the positive plates alternate with the negative.

The liquid used in the cell is dilutesulphuric IOO acid, the mixtureusually being in the propor tion of one of sulphnric acid to ten ofWater. The proportions, however, can be varied.

Having described my improvements, I state in conclusion that I am awarethat lead strips, whether corrugated or plain, or both corrugated andplain, have been arranged together in a variety of ways for theproduction of secondary-battery plates, and thisIdo not broadly claim;but

What I do claim herein as new and of my own invention isl. A plate foraccumulators or secondary batteries, consisting, essentially, of theframe A and the corrugated or bent strips or ribbons a and straight orplain strips or ribbons b, arranged alternati ug With each other in thespace inclosed by the frame and secured individually at their ends toopposite sides of the frame, as and for the purposes hereinbefore setforth.

2. In an accumulator or secondary-battery plate, the combination, withplain strips or ribbons b, of corrugated or bent strips or ribbons a,alternating with strips b, and having their corrugations or bendsoblique to their longitudinal edges, as and for the purposeshereinbefore set forth.

3. An accumulator-plate consisting of the circu mscribing frame A, theplain strips b, and the strips a, alternating with the plain strips andformed with oblique corrugations or bends, as described, said stripsbeing placed in the space inclosed by the frame and individually securedat their ends to said frame, as hereinbefore set forth.

, In testimony whereof I have hereunto set my hand this 25th day ofOctober, A. D. 1887.

NICHOLAS DE BENARDOS.

